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Road Diet V2.0 - Road Diet With Roundabouts, Michael Williams 2018 Michael Williams Company

Road Diet V2.0 - Road Diet With Roundabouts, Michael Williams

TREC Friday Seminar Series

How can we go one step, or one lane, further than the standard road diet? Roundabouts allow a road diet to reduce the final number of lanes from three to two.

Questions arise when roundabouts are used with a road diet. What traffic volumes are supportable? Will the roundabouts fit within existing intersections? What does current guidance tell us about this approach?

Michael Williams will present his work on creating a sequel to FHWA’s Road Diet Informational Guide. This work is intended to provide a feasibility determination tool for the application of this approach to existing corridors. Data from ...


Evaluation Of Route Changes Utilizing High-Resolution Gps Bus Transit Data, Travis Bradley Glick 2018 Portland State University

Evaluation Of Route Changes Utilizing High-Resolution Gps Bus Transit Data, Travis Bradley Glick

TREC Friday Seminar Series

Congestion and travel delay on urban roadways can influence operating costs and service attractiveness. This research uses high resolution bus data to examine sources of delay on urban arterials. A set of tools was created to help visualize trends in bus behavior and movement; this allowed larger traffic trends to be visualized along urban corridors and urban streets. By using buses as probes and examining aggregated bus behavior, contoured speed plots can be used to understand the behavior of roadways outside the zone of influence of bus stops. Speed plots can be utilized to discover trends and travel patterns with ...


Utilization Of Light Detection And Ranging For Quality Control And Quality Assurance Of Pavement Grades, Brad W. Rister, Levi McIntosh, Gabriel B. Dadi, Ruigang Yang, Eileen Grady 2018 University of Kentucky

Utilization Of Light Detection And Ranging For Quality Control And Quality Assurance Of Pavement Grades, Brad W. Rister, Levi Mcintosh, Gabriel B. Dadi, Ruigang Yang, Eileen Grady

Kentucky Transportation Center Research Report

Light Detection and Ranging (Lidar) technology is a useful tool that can assist transportation agencies during the design, construction, and maintenance phases of transportation projects. To demonstrate the utility of Lidar, this report discusses how Lidar data can be used while performing quality control and quality assurance (QC/QA) of pavement grades along road segments where safety concerns have been identified (e.g., increased crash rates due to water ponding on the roadway). Researchers modeled surface runoff using Lidar data for several roadways that had experienced significant crash increases during wet-weather events. Based on this modeling, the Kentucky Transportation Cabinet ...


Spot-R By Triax, Purdue ECT Team 2018 Construction Engineering & Management, Purdue University

Spot-R By Triax, Purdue Ect Team

ECT Fact Sheets

Triax’s Spot-r system was developed to tackle the construction industry’s unique safety and productivity challenges, stemming from a demonstrated lack of total jobsite visibility and automatically collected, easily accessible field data. Spot-r by Triax combines a proprietary mesh network with sensor technology to record and transmit previously unattainable workforce and equipment location, activity and safety data within a defined area – all in real-time.

The Spot-r network is installed around the site and operates in a 900 MHz network, with a subset using a cellular connection to forward Spot-r sensor data to Triax’s custom, cloud dashboard. In the ...


Rethinking The Street In An Era Of Driverless Cars, Marc Schlossberg, William W. Riggs, Adam Millard-Ball, Elizabeth Shay 2018 University of Oregon

Rethinking The Street In An Era Of Driverless Cars, Marc Schlossberg, William W. Riggs, Adam Millard-Ball, Elizabeth Shay

William W. Riggs

Global citizens get few moments to rethink streets and make decisions that will both serve the basic purposes of transportation and address urgent challenges like climate change, rising obesity, social isolation and conflict— all while expanding opportunities for general happiness throughout society. Such a pivotal moment is upon us, as autonomous vehicles represent a potentially disruptive technology that can re-make the city for good or for ill. City planners, policy makers and community residents have a unique, and immediate, opportunity to rethink their streets with purposeful and creative consideration about how this critical public good may best serve the public ...


Evaluation Of The Role Of Driver’S Knowledge Of Who Has The Right-Of-Way Contributes To Interstate On-Ramp Crashes, Deogratias Eustace, Vamsi Krishna Indupuru 2018 University of Dayton

Evaluation Of The Role Of Driver’S Knowledge Of Who Has The Right-Of-Way Contributes To Interstate On-Ramp Crashes, Deogratias Eustace, Vamsi Krishna Indupuru

Deogratias Eustace

The knowledge of drivers on who has the right-of-way between the one on mainline lanes of a freeway and the one entering the freeway through on-ramp junction lane was evaluated. In addition, drivers’ opinions on how to make the on-ramp junctions safer were collected. A survey instrument with 21 items requesting drivers’ information in regard with demographics, freeway driving experience, knowledge of right-of-way and merging practices was used for data collection. The results show that crashes are relatively rare events and for some reasons, most of them never happen but result into near misses, which can not be reported and ...


Low Temperature Performance Of Bio-Derived/Chemical Additives In Warm Mix Asphalt, Joseph H. Podolsky, Jesse Studer, R. Christopher Williams, Eric W. Cochran 2018 Iowa State University

Low Temperature Performance Of Bio-Derived/Chemical Additives In Warm Mix Asphalt, Joseph H. Podolsky, Jesse Studer, R. Christopher Williams, Eric W. Cochran

Eric W. Cochran

Corn and soy based bio-derived warm mix asphalt (WMA) additives are currently being developed. In the past, additives with similar properties have been shown to successfully reduce the mixing and compaction temperatures of asphalt by as much as 30°C. Isosorbide distillation bottoms (IDB), a WMA additive, is a co-product from the conversion of sorbitol to isosorbide, where sorbitol is derived by hydrogenating glucose from corn biomass. Past research utilizing IDB at several dosage rates showed there was improvement in low temperature binder performance using the bending beam rheometer (BBR) between dosage rates of 0.5% and 1.0% by ...


Investigation Of Performance Tests Using Bio-Derived/Chemical Additives, Joseph H. Podolsky, Ashley Buss, R. Christopher Williams, Eric W. Cochran 2018 Iowa State University

Investigation Of Performance Tests Using Bio-Derived/Chemical Additives, Joseph H. Podolsky, Ashley Buss, R. Christopher Williams, Eric W. Cochran

Eric W. Cochran

An industry wide emphasis on sustainable asphalt practices has given rise to increasing use of warm mix asphalt technologies. WMA reduces both binder viscosity and mixing and compaction temperatures by 20-55°C during the asphalt mix production and laydown process. This research investigates several bio-derived WMA additives that act as chemical modifiers with surfactant properties. Two established additives derived from the forest products industry are studied as well as a WMA additive in development that is derived from corn. The WMA material responses are measured for binder testing and mixture testing. All binder testing with the additives was conducted using ...


Use Of Bioadvantaged Materials For Use In Bituminous Modification, Conglin Chen, Joseph H. Podolsky, Nacú B. Hernández, Austin Hohmann, R. Christopher Williams, Eric W. Cochran 2018 Iowa State University

Use Of Bioadvantaged Materials For Use In Bituminous Modification, Conglin Chen, Joseph H. Podolsky, Nacú B. Hernández, Austin Hohmann, R. Christopher Williams, Eric W. Cochran

Eric W. Cochran

Historically, the use of “green” materials around the world has been limited due to their higher production costs when compared to petrochemical derived materials. However, due to the recent volatility and increasing price of petroleum derivatives, there is a growing demand for the use of environmentally friendly materials. One of the most commonly used materials for bitumen modification are poly(styrene-block-butadiene-block-styrene) (SBS) type polymers. Recently, Iowa State University Chemical Engineering Department was able to synthetize thermoplastic elastomers using acrylated epoxidized soybean oil (AESO), a bioadvantaged replacement of butadiene, and styrene with the use of controlled radical polymerization techniques. Initial rheological ...


Purdue’S Biowall, Purdue ECT Team 2018 Construction Engineering & Management, Purdue University

Purdue’S Biowall, Purdue Ect Team

ECT Fact Sheets

Mechanical ventilation, energy recovery ventilation, and infiltration (air that leaks into a building) are commonly used to introduce fresh air. These are all valid approaches, but a living plant-based filter is an innovative complement to these traditional technologies. A Biowall has the potential to improve indoor air quality while reducing the quantity of air needed for ventilation, creating the potential for energy savings. Figure 1 shows a Biowall prototype being evaluated in the ReNEWW House, a research home located near the Purdue University campus (http://www.renewwhouse.com/).


Mdp (Machine Drive Power) Intelligent Compaction Technology, Purdue ECT Team 2018 Construction Engineering & Management, Purdue University

Mdp (Machine Drive Power) Intelligent Compaction Technology, Purdue Ect Team

ECT Fact Sheets

Caterpillar developed MDP (Machine Drive Power) technology to fill this gap. Rather than an accelerometer and vibratory drum, it uses the principle of rolling resistance to provide indications of soil stiffness. This allows it to perform more reliably on cohesive and granular soils with less variability than accelerometer systems. It also means that the technology can be used on both vibratory and static drum compactors, which are often used on larger sites. While the technology is quite useful on its own, it is even better as a complementary technology to the existing accelerometer-based systems. Contractors who use vibratory soil compactors ...


Basic Highway Workzone Safety, Collin Shamberger 2018 The University of Akron

Basic Highway Workzone Safety, Collin Shamberger

Honors Research Projects

The purpose of this essay will be to examine, and provide information detailing work zone safety practices, and maximizing safety in construction zones. This report will examine the functionality of components of a work zone and how they work together, the use of standard construction drawings of work zones, personal protective equipment of workers, possible hazards of work zones, minimizing risks and ultimately work zone safety training. Also this report will provide a spreadsheet which can be used to calculate and layout a construction work zone based on a GPS location.


Future Of Rural Transit, Jill Hough, Ali Rahim Taleqani 2018 Upper Great Plains Transportation Institute, North Dakota State University

Future Of Rural Transit, Jill Hough, Ali Rahim Taleqani

Journal of Public Transportation

This paper provides a contemplative description of the future of rural public transportation. It considers emerging technologies along with their long-term implications and corresponding impacts on rural communities. The authors used their collective knowledge to identify key drivers of change in rural areas. As a result, the authors expect the future definition of rural areas to change and a new geographical classification to emerge. This classification is a continuum of population density gradient from highly populated urban areas to sparsely populated areas. The paper also suggests that automated vehicles and hologram telecommuting could dominate the U.S. transportation industry, even ...


Lies, Damned Lies, Avs, Shared Mobility, And Urban Transit Futures, Graham Currie 2018 Monash University

Lies, Damned Lies, Avs, Shared Mobility, And Urban Transit Futures, Graham Currie

Journal of Public Transportation

It seems to me there is a gigantic lot of nonsense discussed about the future of transport and the future of public transport in particular. As a researcher in the field, I find my emotions boiling over. I get angry at blanket statements telling us public transport has no future and it seems to me much of what is talked about regarding transport futures flies in the face of facts and a long history of what knowledge has gleaned about the human condition, economics, cities, and travel. My hope is that readers will see prevailing discourse differently as a result ...


Just Around The Corner: The Future Of U.S. Public Transportation, Steven E. Polzin 2018 Urban Transportation Research, University of South Florida

Just Around The Corner: The Future Of U.S. Public Transportation, Steven E. Polzin

Journal of Public Transportation

No abstract provided.


Does The Future Of Mobility Depend On Public Transportation?, Kari Watkins 2018 Georgia Institute of Technology

Does The Future Of Mobility Depend On Public Transportation?, Kari Watkins

Journal of Public Transportation

We’ve all seen the headlines. “Will self-driving cars, taxis make mass transit obsolete?” (Davidson 2017) and “What happens if Uber or Lyft outcompetes public transit?” (Sen 2017) or even “Department Of Transportation Says The Future Of Transit Looks Pretty Bleak” (Griggs 2015). We are entering the next great revolution in how people move about in cities. But does the future of transportation mean the end of transit?


Can Public Transportation Compete With Automated And Connected Cars?, Ralph Buehler 2018 Virginia Tech

Can Public Transportation Compete With Automated And Connected Cars?, Ralph Buehler

Journal of Public Transportation

Over the next 30 years, technological innovation will make automobile travel more convenient. Automated and connected vehicles will perform an increasing number of driving tasks without human input and will lure customers away from traditional public transportation. This paper first explores key characteristics of public transportation demand in the United States today--based on an international comparison with other Western countries. Next, the paper provides potential pathways on how public transportation agencies and local governments in the United States could respond to the emergence of automated and connected vehicles. The paper argues that space efficiency in urbanized areas and the rush ...


The Need For Enhanced Physical Infrastructure In The United States, Tanvi Gandham 2018 Claremont McKenna College

The Need For Enhanced Physical Infrastructure In The United States, Tanvi Gandham

CMC Senior Theses

An examination of necessary infrastructure improvements in the United States.


Engineering Standards In Highway Design Litigation, Michael Lewyn 2017 Touro Law Center

Engineering Standards In Highway Design Litigation, Michael Lewyn

Michael E Lewyn

Chapter in "Engineering Standards for Forensic Application." (coauthored) Focuses on soveriegn immunity for highway designers.


Hydrogen Vehicles: Impacts Of Doe Technical Targets On Market Acceptance And Societal Benefits, Jing Dong, Zhenhong Lin, David L. Greene 2017 Iowa State University

Hydrogen Vehicles: Impacts Of Doe Technical Targets On Market Acceptance And Societal Benefits, Jing Dong, Zhenhong Lin, David L. Greene

Jing Dong

Hydrogen vehicles (H2V), including H2 internal combustion engine, fuel cell and fuel cell plug-in hybrid, could greatly reduce petroleum consumption and greenhouse gas (GHG) emissions in the transportation sector. The U.S. Department of Energy has adopted targets for vehicle component technologies to address key technical barriers to widespread commercialization of H2Vs. This study estimates the market acceptance of H2Vs and the resulting societal benefits and subsidy in 41 scenarios that reflect a wide range of progress in meeting these technical targets. Important results include: (1) H2Vs could reach 20–70% market shares by 2050, depending on progress in achieving ...


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